Number Base Converter
Convert integers between bases 2–36 (binary, octal, decimal, hex, custom).
How to Use
- Type a number into any row.
- All rows update live.
- Use custom base for bases up to 36.
Input
base 2
base 8
base 10
base 16
base
Details
Notes
Base 2
0 1
Base 8
0-7
Base 10
0-9
Base 16
0-9 A-F
Max base
36 (0-9 A-Z)
Precision
BigInt — arbitrary size
Frequently Asked Questions
Negatives?
Leading `-` is preserved across bases.
Bases higher than 10?
Use 0-9 then A-Z (case-insensitive).
Common Use Cases
Programming
Decode hex/binary literals.
Study
Learn positional systems.
Last updated: